file_io_type_lid.hpp: Support patch path

Add the ability to patch lid files by having pldm check first if the
lid file exists in the patch directory.

Tested: Verified the expected lid path by printing it out:
- Without lid patches:
Dec 12 18:16:50 witherspoon-128-YL30UF74T00E-YL30UF74T00E-YL30UF74T00E pldmd[363]: LidHandler: lidPath=/usr/share/host-fw/81e002ff.lid
- With lid patches:
Dec 12 18:21:04 witherspoon-128-YL30UF74T00E-YL30UF74T00E-YL30UF74T00E pldmd[363]: LidHandler: lidPath=/usr/local/share/host-fw/81e002ff.lid

Change-Id: I5c70ef69d7be02d090a4516f27c11132e3fff29f
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
diff --git a/meson.build b/meson.build
index 797d8f4..87905a2 100644
--- a/meson.build
+++ b/meson.build
@@ -24,6 +24,7 @@
   conf_data.set_quoted('FILE_TABLE_JSON', '/usr/share/pldm/fileTable.json')
   conf_data.set_quoted('LID_PERM_DIR', '/usr/share/host-fw')
   conf_data.set_quoted('LID_TEMP_DIR', '/usr/share/host-fw')
+  conf_data.set_quoted('LID_PATCH_DIR', '/usr/local/share/host-fw')
   conf_data.set('DMA_MAXSIZE', get_option('oem-ibm-dma-maxsize'))
   add_global_arguments('-DOEM_IBM', language : 'c')
   add_global_arguments('-DOEM_IBM', language : 'cpp')